.login_bg {
  width: 100%;
  height: 100%;
  background: url("../image/bg.jpg") no-repeat;
  background-size: 100% 100%;
}
.login_form {
  position: absolute;
  transform: translate(-50%,-50%);
  top: 50%;
  left: 50%;
  //background-color: pink;
  border-radius: 5px;
  padding: 40px 10px;
  width: 500px;
  height: 300px;
  margin: 0 auto;
}
